Invalidate CircleCI deps cache if the plugin list changes

[arcusfelis]

This PR addresses MIM-2265.

It is hard to handle updates of plugins, circleci would always use the cached old version. And rebar.lock is not tracking plugins.

Proposed changes include:

• Hashing of {plugins, ...}. block. Useful if you are developing or updating plugins
• Invalidate CircleCI deps cache if the plugin list changes
• We use base circle ci image for initial template generation, which has no Erlang. So we use sed to match plugins block and we hash it.

[mongoose-im]

elasticsearch_and_cassandra_26 / elasticsearch_and_cassandra_mnesia / 78ebda1
Reports root/ big
OK: 439 / Failed: 0 / User-skipped: 47 / Auto-skipped: 0

---

small_tests_25 / small_tests / 78ebda1
Reports root / small

---

small_tests_26 / small_tests / 78ebda1
Reports root / small

---

small_tests_26_arm64 / small_tests / 78ebda1
Reports root / small

---

ldap_mnesia_25 / ldap_mnesia / 78ebda1
Reports root/ big
OK: 2337 / Failed: 0 / User-skipped: 905 / Auto-skipped: 0

---

dynamic_domains_pgsql_mnesia_25 / pgsql_mnesia / 78ebda1
Reports root/ big
OK: 4621 / Failed: 0 / User-skipped: 111 / Auto-skipped: 0

---

ldap_mnesia_26 / ldap_mnesia / 78ebda1
Reports root/ big
OK: 2337 / Failed: 0 / User-skipped: 905 / Auto-skipped: 0

---

dynamic_domains_mysql_redis_26 / mysql_redis / 78ebda1
Reports root/ big
OK: 4588 / Failed: 0 / User-skipped: 144 / Auto-skipped: 0

---

dynamic_domains_pgsql_mnesia_26 / pgsql_mnesia / 78ebda1
Reports root/ big
OK: 4621 / Failed: 0 / User-skipped: 111 / Auto-skipped: 0

---

dynamic_domains_mssql_mnesia_26 / odbc_mssql_mnesia / 78ebda1
Reports root/ big
OK: 4618 / Failed: 0 / User-skipped: 114 / Auto-skipped: 0

---

pgsql_cets_26 / pgsql_cets / 78ebda1
Reports root/ big
OK: 4532 / Failed: 0 / User-skipped: 178 / Auto-skipped: 0

---

pgsql_mnesia_25 / pgsql_mnesia / 78ebda1
Reports root/ big
OK: 5012 / Failed: 0 / User-skipped: 118 / Auto-skipped: 0

---

internal_mnesia_26 / internal_mnesia / 78ebda1
Reports root/ big
OK: 2477 / Failed: 0 / User-skipped: 765 / Auto-skipped: 0

---

pgsql_mnesia_26 / pgsql_mnesia / 78ebda1
Reports root/ big
OK: 5012 / Failed: 0 / User-skipped: 118 / Auto-skipped: 0

---

mysql_redis_26 / mysql_redis / 78ebda1
Reports root/ big
OK: 4991 / Failed: 0 / User-skipped: 139 / Auto-skipped: 0

---

mssql_mnesia_26 / odbc_mssql_mnesia / 78ebda1
Reports root/ big
OK: 5009 / Failed: 0 / User-skipped: 121 / Auto-skipped: 0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.34%. Comparing base (4cbb09c) to head (78ebda1).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4346   +/-   ##
=======================================
  Coverage   84.33%   84.34%           
=======================================
  Files         553      553           
  Lines       33730    33730           
=======================================
+ Hits        28447    28449    +2     
+ Misses       5283     5281    -2     

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[NelsonVides]

Very good 👌🏽