Feat: Add strcontains function and documentation

[Cliftonz]

This PR is a continuation of #27518 and #27198 to complete the function for finding a string with in a string.
This new keyword functions as a contains function in terraform to allow users to find strings instead of using the workaround can(regrex(...)).

[hashicorp-cla]

All committers have signed the CLA.

[digital-content-events]

📄 Content Checks

Updated: Fri, 21 Apr 2023 15:06:10 GMT

Found 1 error(s)

docs/language/functions/strcontains.mdx

Position	Description	Rule
1:1-1:1	This file is not present in the nav data file at data/language-nav-data.json. Either add a path that maps to this file in the nav data or remove the file. If you want the page to exist but not be linked in the navigation, add a hidden property to the associated nav node.	no-unlinked-pages

[Cliftonz]

@kmoe @crw @njuCZ

[kmoe]

Thanks. Please add a description for the function here:

terraform/internal/lang/funcs/descriptions.go

Line 24 in 357012a

var DescriptionList = map[string]descriptionEntry{

That will fix unit tests.

[Cliftonz]

@kmoe @crw following up on this

[crw]

@Cliftonz Thanks, I'll follow up.

[crw]

@Cliftonz apologies for the delay - the docs team is going to try to figure out why CI isn't validating your change. Once that validation passes, we'll merge this PR. Thanks for your patience!

[crw]

To be clear, I believe @kmoe will need to merge it. Thanks!

[github-actions]

Reminder for the merging maintainer: if this is a user-visible change, please update the changelog on the appropriate release branch.

[crw]

For posterity, please see #33101 for the follow-up PR that fixes the CI/docs issue.

[github-actions]

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