asim: introduce rand testing framework with default-only settings

[wenyihu6]

This patch lays the backbone of the randomized testing framework. Currently, it
only supports default configuration for all options, implying that there is no
randomization yet. Additionally, it refactors some of the existing structure in
data_driven_test. Note that this should not change any existing behavior, and
the main purpose is to make future commits cleaner.

TestRandomized is a randomized testing framework designed to validate
allocator by creating randomized configurations, generating corresponding
allocator simulations, and validating assertions on the final state.

Input of the framework (fields in the testSetting struct):

1. numIterations (int, default: 3): specifies number of test iterations to be
   run, each with different random configurations generated
2. duration (time.Duration, default: 30min): defined simulated duration of
   each iteration verbose (bool, default: false): enables detailed simulation
   information failing output
3. randSeed (int64, default: 42): sets seed value for random number
   generation
4. assertions ([]SimulationAssertion, default: conformanceAssertion with 0
   under-replication, 0 over-replication, 0 violating, and 0 unavailable):
   defines criteria for validation assertions
5. randOptions: guides the aspect of the test configuration that should be
   randomized. This includes:

• cluster (bool): indicates if the cluster configuration should be randomized
• ranges (bool): indicates if the range configuration should be randomized
• load (bool): indicates if the workload configuration should be randomized
• staticSettings (bool): indicates if the simulation static settings should
  be randomized
• staticEvents (bool): indicates if static events, including any delayed
  events to be applied during the simulation, should be randomized

RandTestingFramework is initialized with a specified testSetting and
maintained its state across all iterations. Each iteration in
RandTestingFramework executes the following steps:

1. Generates a random configuration based on whether the aspect of the test
   configuration is set to be randomized in randOptions
2. Executes a simulation and store any assertion failures in a buffer

Part of: #106311
Release note: None

[cockroach-teamcity]

This change is 

[kvoli]

See review comments on #107354

I don't think there are any which block this first commit.

Reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @wenyihu6)

[wenyihu6]

Most comment don't apply to this commit, except for the GetNumStores part. But it doesn't need to be included in the first commit, so I've removed it and will add it in the next one.

[wenyihu6]

TFTR!

bors r=kvoli

[craig]

This PR was included in a batch that timed out, it will be automatically retried

[craig]

Build succeeded:

• Bazel Essential CI (Cockroach)