fix(random): replacing with depricated math/rand.Read until we need to change it

[CodeLieutenant]

While upgrading to go 1.24 and to the new math/rand/v2 package, math/rand.Read has been replaced with math/rand/v2.ChaCha8.Read but it's not properly initialized to generate good random data. Until this is figured out, fallback to math/rand.Read is required

Fixes #168

Argus Test: https://argus.scylladb.com/tests/scylla-cluster-tests/5227cd40-b27d-4c19-bc23-3ad580a1a18d (now scylla-bench does not fail, test fails for different reasons

[Copilot]

Pull Request Overview

This PR temporarily reverts to using the legacy math/rand.Read for random data generation while investigating proper initialization for math/rand/v2.ChaCha8.

• Updated import alias to reference math/rand as a fallback.
• Replaced the ChaCha8.Read call with math/rand.Read including an inline nolint directive.

[Copilot]

Pull Request Overview

This PR provides a temporary fallback for generating random data while upgrading to Go 1.24 and switching to math/rand/v2 by reverting to the old math/rand.Read method until a proper initialization for ChaCha8 is implemented. Key changes include:

• Updating random number generation sources in random.go to use math/rand/v2 and introducing LockedRandom and LockedRandomString types.
• Modifying GenerateData and related functions in modes.go to return errors instead of panicking.
• Adjusting tests, benchmarks, main.go, and the golangci configuration for the new Go version.

Reviewed Changes

Copilot reviewed 6 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
random/random_test.go	Added extra imports and tests for LockedRandomString generation.
random/random.go	Refactored randomness generators with new types and initialization, switching to math/rand/v2.
modes.go	Updated GenerateData and data validation to return errors and included safety checks.
main.go	Exited with a status code from the final test result.
.golangci.yml	Updated Go version to 1.24.

Files not reviewed (3)

• Dockerfile: Language not supported
• Makefile: Language not supported
• go.mod: Language not supported

[Copilot]

Pull Request Overview

This PR updates the random number generation by falling back to the deprecated math/rand.Read until a proper initialization for math/rand/v2.ChaCha8 is implemented. Key changes include updating random generator implementations in the random package, adding error handling in data generation, and adjusting tests and benchmark functions.

Reviewed Changes

Copilot reviewed 6 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
random/random_test.go	Updates tests and benchmarks to use the new random generators
random/random.go	Switches from math/rand to math/rand/v2, implements new locked random types
modes.go	Modifies GenerateData to return errors and updates query binding in workloads
main.go	Changes final status handling to an os.Exit call
.golangci.yml	Updates the Go version to 1.24

Files not reviewed (3)

• Dockerfile: Language not supported
• Makefile: Language not supported
• go.mod: Language not supported