[Cloud Posture] update findings indexing state text

[orouz]

this is a quick wins task

when users visit the findings page before CSP is done indexing latest findings, we show a text with "No findings yet" which was improved in this PR to a more descriptive text.

[elasticmachine]

Pinging @elastic/kibana-cloud-security-posture (Team:Cloud Security Posture)

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: d362c81

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
cloudSecurityPosture	128.1KB	128.1KB	+12.0B

Unknown metric groups

ESLint disabled in files

id	before	after	diff
osquery	1	2	+1

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	19	21	+2
fleet	59	65	+6
osquery	108	113	+5
securitySolution	441	447	+6
total			+19

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	20	22	+2
fleet	67	73	+6
osquery	109	115	+6
securitySolution	518	524	+6
total			+20

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[olegsu]

Verified