Ability to control default cache-control in Deployer uploads (mdn#3517)

Fixes mdn#3516

parse specific cookie vlue first (mdn#3540)

always measure how long gatherTranslations() takes (mdn#3536)

build(deps-dev): bump stylelint-config-recommended from 3.0.0 to 4.0.0 (

mdn#3162)

Bumps [stylelint-config-recommended](https://github.com/stylelint/stylelint-config-recommended) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/stylelint/stylelint-config-recommended/releases)
- [Changelog](https://github.com/stylelint/stylelint-config-recommended/blob/master/CHANGELOG.md)
- [Commits](stylelint/stylelint-config-recommended@3.0.0...4.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

don't broken_links check home page urls with hash (mdn#3528)

* don't broken_links check home page urls with hash

Fixes mdn#3515

* findByURL requires URL to contain /docs/

switch to parallel_bulk() (mdn#3426)

Fixes mdn#3417

include preferredlocale in 'Change language' event (mdn#3520)

Part of mdn#3519

build(deps): bump js-yaml from 4.0.0 to 4.1.0 (mdn#3523)

Use Elasticsearch index aliases to avoid search downtime (mdn#3409)

* Use ElasticSearch index aliases to avoid search downtime

Fixes mdn#3098

* Use ElasticSearch index aliases to avoid search downtime

Part of mdn#3098

(the reason this PR doesn't close issue mdn#3098) is because the `prod-build.yml` still uses `--update`)

* flake8

* Apply suggestions from code review

Co-authored-by: Ryan Johnson <escattone@gmail.com>

* remove 'already'

* feedbacked

* cleaning up

* cope with --update the first time ever

* Apply suggestions from code review

Co-authored-by: Ryan Johnson <escattone@gmail.com>

* feedbacked

Co-authored-by: Ryan Johnson <escattone@gmail.com>

don't double-encode the query string when redirecting (mdn#3502)

Fixes mdn#3425