Change index selectors, update to current standards

[Nuru]

what

• Update providers to support AWS 3.x and generally convert ~> to >=
• BREAKING CHANGE: Rebase es-cleanup.py on cloudreach v0.14
• Update test dependencies, use Go modules, ensure test resources include random component
• Update to context.tf
• Update GitHub actions

why

• AWS 3.x has new features we need. ~> inhibits testing new releases.
• Now index selection is regex minus regex, much better than previous comma separated list. Other bug fixes.
• Test with current modules using current testing practices
• Keep in sync with other modules

migration

Prior versions had index which was a comma-separated list of index names or the special name "all" to indicate all but Kibana indexes, and index_regex which was a regular expression for parsing index name and date parts. There was no mechanism for specifying a list of indexes to exclude. This version drops those input variables and instead provides index_re and skip_index_re, both of which are regular expressions. You probably want to anchor your regexes to the beginning of the index name by starting with ^.

• If the full index name, including the date part, matches skip_index_re, then the index will be skipped (never deleted).
• If the index name without the trailing -date part matches index_re, then it will be cleaned up according to the date part.

If you previously had	Now use
index = "all"	Default values for index_re and skip_index_re
index = "a,xb,c0"	index_re = "^(a|xb|c0)" and skip_index_re = "^$"
index_regex = "(ipat)-(dpat)"	index_re = "ipat" and be sure index_format is correct for your date format

Keep in mind that fundamentally, this module expects indexes to be in the format of name-date so it will not work properly if the regexes end up selecting an index that does not end with -date. To avoid edge cases, it is wise not to include dashes in your index name or date format.

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