Improve Bitbucket getPrList() verbosity

[rarkins]

Describe the proposed change(s).

Lower this to trace as it's called often:

renovate/lib/modules/platform/bitbucket/index.ts

Line 286 in 85267b9

logger.debug('getPrList()');

Add debug logs to

renovate/lib/modules/platform/bitbucket/pr-cache.ts

Lines 59 to 66 in 85267b9

	static async getPrs(
	http: BitbucketHttp,
	repo: string,
	author: string | null,
	): Promise<Pr[]> {
	const prCache = await BitbucketPrCache.init(http, repo, author);
	return prCache.getPrs();
	}

and subfunctions for any thing which is run once (no need to repeat if getPrList() is called repeatedly in a run)

[renovate-release]

🎉 This issue has been resolved in version 39.6.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 39.6.0

Your semantic-release bot 📦🚀