crypto/internal/fips140/drbg: backport CL 774221 to Go 1.26 [1.26 backport]

[gopherbot]

@cherrymui requested issue #79203 to be considered for backport to the next 1.26 minor release.

@gopherbot please backport this to Go 1.26 release. (Retargeting this to Go 1.27 milestone and create a separate issue for backport, for procedural reasons.)

[gopherbot]

Change https://go.dev/cl/774980 mentions this issue: [release-branch.go1.26] crypto/internal/fips140/drbg: fix Wasm stub

[gopherbot]

Closed by merging CL 774980 (commit 26c2ac5) to release-branch.go1.26.