Rename wording to allowlist and blocklist

Background / User story

In continue to the discussion about wording in the products we will change our wording to allowlist and blocklist

What to change

• Design: N/A
• Research: N/A
• Spec: https://gitlab.com/eyeo/specs/spec/-/merge_requests/369
• Legal: Please don't even ask 😇
• Development: We could run the changes against Manvel's (awesome) list here.

Hints for testers

• Besides of the changes in UI strings we have also renamed variables in codebase, so far no issue is noticed, but running generic tests(not only targeting UI) would be great, as we touched most of the codebase.
• Also we deprecated whitelist doclink in favor of allowlist, so would be great to ensure that whitelist doclink is yet around for backwards compatibility and point to the same page as allowlist doclink.

Hints for translators

Changed text of current strings:

• devtools_header_state_allowlisted
• firstRun_fair_description
• options_allowlist_empty_1
• options_allowlist_notification
• problem_note

Changed description of current strings:

• options_tab_allowlist
• options_allowlist_description
• options_allowlist_add
• options_allowlist_placeholder_example
• options_allowlist_empty_1
• options_allowlist_empty_2
• options_customize_showDevToolsPanel_tooltip
• options_allowlist_notification

Integration notes

None.