Fix Opensearch compatibility check

What does this MR do and why?

In this MR we are doing a couple of things:

• Match SystemCheck::App::SearchCheck with the stated Opensearch versions supported (1.x or later)
• Switch ee/spec/lib/system_check/app/search_check_spec.rb to using fast_spec_helper, which drastically improve performance

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MR acceptance checklist

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Related to #378958 (closed)

changed milestone to %Backlog

added Category:Global Search Next1-3 releases [deprecated] Accepting merge requests customer devopsdata stores groupglobal search sectioncore platform typebug labels

assigned to @dgruzd

changed milestone to %15.6

added Pick into 15.3 Pick into 15.4 Pick into 15.5 labels

added backend label

Reviewer roulette

Changes that require review have been detected!

Please refer to the table below for assigning reviewers and maintainers suggested by Danger in the specified category:

Category	Reviewer	Maintainer
backend	Bojan Marjanović (@bmarjanovic) (UTC+2, same timezone as @dgruzd)	Mikołaj Wawrzyniak (@mikolaj_wawrzyniak) (UTC+2, same timezone as @dgruzd)

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Proper labels assigned to this merge request. Please ignore me.

@dgruzd - please see the following guidance and update this merge request.

	1 Warning
	Please add a subtype label to this merge request.

If you have added a type label and do not feel the purpose of this merge request matches one of the subtypes labels, please resolve this discussion.

added 1 commit

• 9a43f654 - Fix Opensearch compatibility check

Compare with previous version

marked the checklist item I have evaluated the MR acceptance checklist for this MR. as completed

added 1 commit

• d77140d6 - Fix Opensearch compatibility check

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added bugfunctional label

resolved all threads

@maddievn could I ask you to provide an initial review for this MR and assign it to @terrichu if everything's ok? Thank you!

marked this merge request as ready

requested review from @maddievn

mentioned in issue #378958 (closed)

approved this merge request

@maddievn, thanks for approving this merge request.

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