protobuf: fix meson check for protoc and fix usage from contribs

Protobuf and protoc version naming changed starting after version 21.7.11.x, at version 22.x.y¹. Other versioning changes during the 21.* cycle were made right before².

The new versioning is described on the specific page from protocol buffers website³.

For instance, protoc from archlinux currently outputs version 25.3, leading to the following message if checking a 3-number version number like the version in the contribs:

Program protoc found: NO found 25.3 but need: '25.3.0' (/usr/bin/protoc)

After this patch we have the following with version 25.3:

Program protoc found: YES 25.3 25.3 (/usr/bin/protoc)

and with version 21.1 from contrib:

Program protoc found: YES 3.21.1 3.21.1

This MR also provides the protoc and luac binaries from the contribs to meson through the generated meson-machinefile, so that this problem can be tested locally with the contribs.

1. https://protobuf.dev/news/2022-07-06/ ↩

2. https://protobuf.dev/news/2022-05-06/ ↩

3. https://protobuf.dev/support/version-support/ ↩