Multiple ClickOnce versions fail to be signed

**Describe the bug**

When using a git repository to host a ClickOnce project, additional previous versions may exist. This means each version will contain a manifest file so when the sign tool iterates through the `ClickOnceSigner` looking for a `SingleOrDefault` manifest to sign, it may find more than one, resulting in the below stack trace.

**Repro steps**

1. Publish ClickOnce output
2. Bump version
3. Publish ClickOnce output to same directory
4. Run sign tool on manifest `.application` file
5. ~~Profit~~ Encounter exception

**Expected behavior**

I believe two different behaviors are acceptable here per manifest file:

1. Iterate across all files, signing as usual.
2. Iterate across all files. If files were previously signed, for example version 1 was signed previously, don't re-sign.

I believe the preference should probably be with the first, but I'm indifferent

**Actual behavior**

```
fail: Sign.Core.ISigner[0]
Sequence contains more than one matching element
System.InvalidOperationException: Sequence contains more than one matching element
at System.Linq.ThrowHelper.ThrowMoreThanOneMatchException()
at System.Linq.Enumerable.TryGetSingle[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
at Sign.Core.ClickOnceSigner.<>c__DisplayClass9_0.<b__0>d.MoveNext() in /_/src/Sign.Core/DataFormatSigners/ClickOnceSigner.cs:line 130
--- End of stack trace from previous location ---
at System.Threading.Tasks.Parallel.<>c__53`1.<b__53_0>d.MoveNext()
--- End of stack trace from previous location ---
at Sign.Core.ClickOnceSigner.SignAsync(IEnumerable`1 files, SignOptions options) in /_/src/Sign.Core/DataFormatSigners/ClickOnceSigner.cs:line 82
at Sign.Core.AggregatingSigner.SignAsync(IEnumerable`1 files, SignOptions options) in /_/src/Sign.Core/DataFormatSigners/AggregatingSigner.cs:line 204
at Sign.Core.Signer.<>c__DisplayClass3_0.<b__0>d.MoveNext() in /_/src/Sign.Core/Signer.cs:line 155
--- End of stack trace from previous location ---
at System.Threading.Tasks.Parallel.<>c__53`1.<b__53_0>d.MoveNext()
--- End of stack trace from previous location ---
at Sign.Core.Signer.SignAsync(IReadOnlyList`1 inputFiles, String outputFile, FileInfo fileList, DirectoryInfo baseDirectory, String applicationName, String publisherName, String description, Uri descriptionUrl, Uri timestampUrl, Int32 maxConcurrency, HashAlgorithmName fileHashAlgorithm, HashAlgorithmName timestampHashAlgorithm) in /_/src/Sign.Core/Signer.cs:line 84
```

**Additional context**

Potentially problematic code:

https://github.com/dotnet/sign/blob/d018f756bb9fea160069bca578f6f1bb33d00549/src/Sign.Core/DataFormatSigners/ClickOnceSigner.cs#L125-L132

This issue happened with at least the three latest versions:

- `0.9.1-beta.24406.1+6584f5d081d8a06660d58d1a777b2352ff376a68`
- `0.9.1-beta.24170.3`
- `0.9.1-beta.24361.2`

```
dotnet --info
```

```
.NET SDK:
Version: 8.0.400
Commit: 36fe6dda56
Workload version: 8.0.400-manifests.56cd0383
MSBuild version: 17.11.3+0c8610977

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\8.0.400\

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
[android]
Installation Source: VS 17.11.35219.272
Manifest Version: 34.0.113/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.android\34.0.113\WorkloadManifest.json
Install Type: FileBased

[maccatalyst]
Installation Source: VS 17.11.35219.272
Manifest Version: 17.5.8020/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maccatalyst\17.5.8020\WorkloadManifest.json
Install Type: FileBased

[wasm-tools]
Installation Source: VS 17.11.35219.272
Manifest Version: 8.0.8/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.workload.mono.toolchain.current\8.0.8\WorkloadManifest.json
Install Type: FileBased

[maui-windows]
Installation Source: VS 17.11.35219.272
Manifest Version: 8.0.72/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maui\8.0.72\WorkloadManifest.json
Install Type: FileBased

[ios]
Installation Source: VS 17.11.35219.272
Manifest Version: 17.5.8020/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.ios\17.5.8020\WorkloadManifest.json
Install Type: FileBased

[aspire]
Installation Source: VS 17.11.35219.272
Manifest Version: 8.1.0/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.1.0\WorkloadManifest.json
Install Type: FileBased

Host:
Version: 8.0.8
Architecture: x64
Commit: 08338fcaa5

.NET SDKs installed:
3.1.426 [C:\Program Files\dotnet\sdk]
6.0.321 [C:\Program Files\dotnet\sdk]
8.0.400 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.33 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.33 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.33 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download
```