[DOCS] Add Alerts Content to the GX Cloud Documentation

[kwcanuck]

DOC-731 requests that the new alerts functionality be documented and added to the GX Cloud documentation. This PR implements this request.

Definition of done:

• PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
• Appropriate tests and docs have been updated

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.80%. Comparing base (3aaa855) to head (8634a5b).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #9880      +/-   ##
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.83%. Comparing base (b7c4291) to head (7f61b00).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #9880   +/-   ##
========================================
  Coverage    77.83%   77.83%           
========================================
  Files          454      454           
  Lines        39533    39533           
========================================
  Hits         30771    30771           
  Misses        8762     8762           

Flag	Coverage Δ
3.10	64.42% <ø> (ø)
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3.10 big	?
3.10 databricks	?
3.10 filesystem	?
3.10 mssql	?
3.10 mysql	?
3.10 postgresql	?
3.10 snowflake	?
3.10 spark	?
3.10 trino	?
3.11	64.42% <ø> (ø)
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cloud	0.00% <ø> (ø)
docs-basic	47.63% <ø> (ø)
docs-creds-needed	48.76% <ø> (ø)
docs-spark	47.57% <ø> (ø)

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