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GH-44076: [CI] Remove verify-rc-binaries-wheel-macos-11 which is now deprecated (#44077)

### Rationale for this change

Our wheels deployment target is now MACOSX_DEPLOYMENT_TARGET=12.0 and the macOS 11 runner is deprecated.

### What changes are included in this PR?

Remove macos-11 from CI matrix.

### Are these changes tested?

No, those jobs are triggered on release and is just removing a job from the matrix.

### Are there any user-facing changes?

No
* GitHub Issue: #44076

Authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Signed-off-by: Jacob Wujciak-Jens <jacob@wujciak.de>