Ability to do a find/replace on resulting tags prior to sorting

**What steps did you take:**
```
vendir tools sort-semver -v "v1.17.16_vmware.2-tkg.1 v1.17.16_vmware.2-tkg.2 v1.17.16_vmware.3-tkg.1 v1.18.16_vmware.1-tkg.1 v1.18.16_vmware.1-tkg.2 v1.18.16_vmware.3-tkg.1 v1.18.17_vmware.1-tkg.1 v1.18.17_vmware.2-tkg.1 v1.19.12_vmware.1-tkg.1 v1.19.12_vmware.1-tkg.2 v1.19.12_vmware.1-tkg.3-tf-v0.10.1 v1.19.16_vmware.1-tkg.1 v1.19.8_vmware.1-tkg.1 v1.19.8_vmware.1-tkg.2 v1.19.8_vmware.3-tkg.1 v1.19.9_vmware.1-tkg.1 v1.19.9_vmware.2-tkg.1 v1.20.11_vmware.1-tkg.1-tf-v0.10.1 v1.20.14_vmware.1-tkg.1 v1.20.14_vmware.1-tkg.2 v1.20.14_vmware.1-tkg.4 v1.20.14_vmware.1-tkg.4-tf-v0.11.2 v1.20.14_vmware.1-tkg.5 v1.20.4_vmware.1-tkg.1 v1.20.4_vmware.1-tkg.2 v1.20.4_vmware.3-tkg.1 v1.20.5_vmware.1-tkg.1 v1.20.5_vmware.2-fips.1-tkg.1 v1.20.5_vmware.2-tkg.1 v1.20.8_vmware.1-fips.1-tkg.2 v1.20.8_vmware.1-tkg.2 v1.20.8_vmware.1-tkg.3 v1.21.2_vmware.1-fips.1-tkg.1 v1.21.2_vmware.1-tkg.1 v1.21.2_vmware.1-tkg.2 v1.21.5_vmware.1-tkg.1-tf-v0.10.1 v1.21.8_vmware.1-tkg.1 v1.21.8_vmware.1-tkg.2 v1.21.8_vmware.1-tkg.4 v1.21.8_vmware.1-tkg.4-tf-v0.11.2 v1.21.8_vmware.1-tkg.5 v1.22.5_vmware.1-tkg.1 v1.22.5_vmware.1-tkg.3 v1.22.5_vmware.1-tkg.3-tf-v0.11.2 v1.22.5_vmware.1-tkg.4 "
```
```
Versions

Version

Succeeded
```

**What happened:**
Nothing is properly detected as semantic versioned.

**What did you expect:**
Replacing `+` with `_` is a common change since container tags cannot have a + in them. In fact most systems (like containerd) will actually replace the + into a _ for you.

```
vendir tools sort-semver -v "v1.17.16+vmware.2-tkg.1 v1.17.16+vmware.2-tkg.2 v1.17.16+vmware.3-tkg.1 v1.18.16+vmware.1-tkg.1 v1.18.16+vmware.1-tkg.2 v1.18.16+vmware.3-tkg.1 v1.18.17+vmware.1-tkg.1 v1.18.17+vmware.2-tkg.1 v1.19.12+vmware.1-tkg.1 v1.19.12+vmware.1-tkg.2 v1.19.12+vmware.1-tkg.3-tf-v0.10.1 v1.19.16+vmware.1-tkg.1 v1.19.8+vmware.1-tkg.1 v1.19.8+vmware.1-tkg.2 v1.19.8+vmware.3-tkg.1 v1.19.9+vmware.1-tkg.1 v1.19.9+vmware.2-tkg.1 v1.20.11+vmware.1-tkg.1-tf-v0.10.1 v1.20.14+vmware.1-tkg.1 v1.20.14+vmware.1-tkg.2 v1.20.14+vmware.1-tkg.4 v1.20.14+vmware.1-tkg.4-tf-v0.11.2 v1.20.14+vmware.1-tkg.5 v1.20.4+vmware.1-tkg.1 v1.20.4+vmware.1-tkg.2 v1.20.4+vmware.3-tkg.1 v1.20.5+vmware.1-tkg.1 v1.20.5+vmware.2-fips.1-tkg.1 v1.20.5+vmware.2-tkg.1 v1.20.8+vmware.1-fips.1-tkg.2 v1.20.8+vmware.1-tkg.2 v1.20.8+vmware.1-tkg.3 v1.21.2+vmware.1-fips.1-tkg.1 v1.21.2+vmware.1-tkg.1 v1.21.2+vmware.1-tkg.2 v1.21.5+vmware.1-tkg.1-tf-v0.10.1 v1.21.8+vmware.1-tkg.1 v1.21.8+vmware.1-tkg.2 v1.21.8+vmware.1-tkg.4 v1.21.8+vmware.1-tkg.4-tf-v0.11.2 v1.21.8+vmware.1-tkg.5 v1.22.5+vmware.1-tkg.1 v1.22.5+vmware.1-tkg.3 v1.22.5+vmware.1-tkg.3-tf-v0.11.2 v1.22.5+vmware.1-tkg.4
"
```
```
Versions

Version
v1.17.16+vmware.2-tkg.1
v1.17.16+vmware.2-tkg.2
v1.17.16+vmware.3-tkg.1
v1.18.16+vmware.1-tkg.1
v1.18.16+vmware.1-tkg.2
v1.18.16+vmware.3-tkg.1
v1.18.17+vmware.1-tkg.1
v1.18.17+vmware.2-tkg.1
v1.19.8+vmware.1-tkg.1
v1.19.8+vmware.1-tkg.2
v1.19.8+vmware.3-tkg.1
v1.19.9+vmware.1-tkg.1
v1.19.9+vmware.2-tkg.1
v1.19.12+vmware.1-tkg.1
v1.19.12+vmware.1-tkg.2
v1.19.12+vmware.1-tkg.3-tf-v0.10.1
v1.19.16+vmware.1-tkg.1
v1.20.4+vmware.1-tkg.1
v1.20.4+vmware.1-tkg.2
v1.20.4+vmware.3-tkg.1
v1.20.5+vmware.1-tkg.1
v1.20.5+vmware.2-fips.1-tkg.1
v1.20.5+vmware.2-tkg.1
v1.20.8+vmware.1-fips.1-tkg.2
v1.20.8+vmware.1-tkg.2
v1.20.8+vmware.1-tkg.3
v1.20.11+vmware.1-tkg.1-tf-v0.10.1
v1.20.14+vmware.1-tkg.1
v1.20.14+vmware.1-tkg.2
v1.20.14+vmware.1-tkg.4
v1.20.14+vmware.1-tkg.5
v1.20.14+vmware.1-tkg.4-tf-v0.11.2
v1.21.2+vmware.1-fips.1-tkg.1
v1.21.2+vmware.1-tkg.1
v1.21.2+vmware.1-tkg.2
v1.21.5+vmware.1-tkg.1-tf-v0.10.1
v1.21.8+vmware.1-tkg.1
v1.21.8+vmware.1-tkg.2
v1.21.8+vmware.1-tkg.4
v1.21.8+vmware.1-tkg.5
v1.21.8+vmware.1-tkg.4-tf-v0.11.2
v1.22.5+vmware.1-tkg.1
v1.22.5+vmware.1-tkg.3
v1.22.5+vmware.1-tkg.4
v1.22.5+vmware.1-tkg.3-tf-v0.11.2

Highest version: v1.22.5+vmware.1-tkg.3-tf-v0.11.2

Succeeded
```

**Anything else you would like to add:**
I don't want to solutionize here, since folks might intentionally have the `_` there and it's not meant to turn into a `+`, just illustrating that in this isolated event treating the `_` as a `+` would fix things.

**Environment:**

- vendir version (execute `vendir --version`): `0.26.0`
- OS (e.g. from `/etc/os-release`): Fedora 35

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