fix: update go-test module

[gammazero]

🧪 Tests use new go-test and math/rand/v2

The new go-test is upgraded to use math/rand/v2 in all of its packages. The /go-test/random package now allows reuse of the random number generator for more efficiently generating sets of random values.

Additionally, the /go-test/random package removes support for a global seed for the random number generator. This led to the possibility of multiple tests setting the global seed to generate deterministic values, and breaking other tests by causing the generator to generate unexpected values. This breakage could be intermittent and difficult to debug, depending on the how/which tests ran at the same time.

Since the underlying pseudo-random number generator was changed in the go-test module, the data generated for a given seed also changed. This required updating tests that relied on seeding the generator and getting expected values.

• Use new go-test/random API
  • no global seed values
  • reuse generator where appropriate
• Fix tests to match new random data generation
  • update expected deterministic values
  • fix t0040-add-and-cat.sh
  • fix t0043-add-w.sh
  • fix t0045-ls.sh
  • fix t0087-repo-robust-gc.sh
  • fix t0270-filestore.sh
  • fix t0271-filestore-utils.sh
  • fix t0272-urlstore.sh
• Migrate from /math/rand' to /math/rand/v2`
  • random seeds are now [32]byte and not uint64
  • use StringToSeed or Uint64ToSeed to create random seeds for deterministic output

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	github.com/​ipfs/​boxo@​v0.41.1-0.20260707130650-177b35c8ef09 ⏵ v0.41.1-0.20260714175209-5ecaf9b4bcda	+1
	github.com/​ipfs/​go-test@​v0.3.0 ⏵ v0.4.0	+1

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[lidel]

LGTM, thank you @gammazero, the pin is still a commit on the boxo branch, so once ipfs/boxo#1187 lands, re-pin to boxo main and go ahead and merge, no need to wait on me.