fix: Add support for PAT in Bitbucket Server. Closes #14900

[aulisius]

Changes

This PR allows users to specify PAT for Bitbucket server as an alternative to username/password

Context

• Add Authorization type of "Bearer <token>" for Bitbucket Server #14900

Documentation (please check one with an [x])

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• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 35.9.0 🎉

The release is available on:

• GitHub release
• 35.9.0

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[Churro]

Has this actually been tested?

I'm wondering where's the code that actually uses the token because e.g. this piece still says password only:

renovate/lib/modules/platform/bitbucket-server/utils.ts

Line 160 in d739141

auth: `${opts.username}:${opts.password}`,

or here:

renovate/lib/modules/platform/bitbucket-server/utils.ts

Line 179 in d739141

repoUrl.password = opts.password!;

[viceice]

@rarkins we should revert this, as it's not working as intended

[rarkins]

Sorry!