File modified outside RPM breaks checksum test

[BenGig]

Kibana version:
7.4.2

Server OS version:
RHEL 7.7

Original install method (e.g. download page, yum, from source, etc.):
yum install from official repo

Describe the bug:
The file

/usr/share/kibana/optimize/.babel_register_cache.json

is part of the RPM installation. During operation, this file is modified. Because it is not marked for modification, as ie. a configuration is, this breaks jobs verifiying the RPM checksums. Such jobs are part of company compliance checks, kibana servers pop up regularly showing as incompliant.

Steps to reproduce:

1. Install kibana
2. Run kibana
3. Verify with rpm -Va | grep '^..5': only files marked with 'c' in the 2nd column are configuration files and allowed to be changed after installation:

Expected behavior:
Cache file should either not be included in RPM, not go to the installation directory but a cache dir, or marked as changeable in the RPM

Provide logs and/or server output (if relevant):

[root@kibanahost]# rpm -Va | grep '^..5'
S.5....T.  c /etc/aliases
S.5....T.  c /etc/elasticsearch/elasticsearch.yml
S.5....T.  c /etc/login.defs
S.5....T.  c /etc/sysctl.conf
S.5....T.  c /etc/os-release
S.5....T.  c /etc/ssh/sshd_config
S.5....T.  c /etc/sysconfig/authconfig
S.5....T.  c /etc/kibana/kibana.yml
S.5..UGT.    /usr/share/kibana/optimize/.babel_register_cache.json
SM5..UGT.  c /etc/logstash/logstash.yml
S.5....T.  c /etc/puppetlabs/puppet/puppet.conf
S.5....T.  c /etc/openldap/ldap.conf
S.5....T.  c /etc/rhsm/rhsm.conf```

[elasticmachine]

Pinging @elastic/kibana-operations (Team:Operations)

[jbudz]

babel/register was removed starting in 7.10 with #79379 so babel writes should no longer be a source. All writes should go to /var/lib/kibana from now on, lets reopen if there's any further issues.