modd: deprecate

[branchv]

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To use go 1.17 for #83413, x/sys needs to be upgraded (see cortesi/modd#103). However, the patch isn't directly usable as the latest release isn't using modules and we've had no response from cortesi/modd#96.

I first tried applying cortesi/devd@4ab3fc9, but that fails due to a symlink:

patch: **** File vendor/github.com/bmatcuk/doublestar/test/b/symlink-dir is not a regular file -- can't patch

any other alternatives here?

[SMillerDev]

I don't think we want to go back to dep, I'd rather deprecate the formula and let it use an older go version until it's eventually removed.

[branchv]

works for me, it's disappointing because master still sees commits just no tagged release in 2+ years. maybe that's common in the go community

[BrewTestBot]

🤖 A scheduled task has triggered a merge.