`cabal install` prints unhelpful error when .cabal filename does not match the package name

**Describe the bug**

In a project where the `.cabal` file has underscores in the name, `cabal install` fails with an unhelpful error message:

```
dieVerbatim: user error (cabal: Package .cabal file not found in the tarball:
/tmp/cabal-install.-42328/dist-newstyle/tmp/src-42328/note-graph-0.0.0.0/note-graph.cabal
)
```

After much head-scratching, I realized the problem was I needed to rename `note_graph.cabal` to `note-graph.cabal`.

**To Reproduce**
Steps to reproduce the behavior:

* Put the following in a file called `a_b.cabal`.
```
cabal-version: 2.2
name: a-b
version: 0.0.0.0
build-type: Simple

executable x
default-language: Haskell2010
build-depends: base
main-is: Main.hs
```
* Put something in `Main.hs`.
* `cabal v2-install .:x`

**Expected behavior**

One of the following would be preferrable:
* The installation works.
* Cabal prints an error like `Your .cabal file should not have underscores in the name.`

**System information**
OpenBSD current

I've got custom-built `ghc` and `cabal-install` ports; let me know if you'd like me to retry with an unmodified install.

```falsifian moth d $ ghc --version
The Glorious Glasgow Haskell Compilation System, version 8.6.4
falsifian moth d $ cabal --version
cabal-install version 3.4.0.0
compiled using version 3.4.0.0 of the Cabal library```

Reproduce the issue with an a_b.cabal file declaring package name a-b, then run cabal v2-install .:x and inspect how cabal-install locates the package file in the generated tarball. Done means installation succeeds or the command reports clearly that the .cabal filename must match the package name.

Written by the indexing model from the issue text.