lib/fips140: freeze FIPS 140-3 module v2.0.0

[FiloSottile]

Before the final Go 1.26 release, we need to freeze a v2.0.0 module and remove the v2.0.0-rc.1 module.

/cc @golang/release @golang/security

[gabyhelp]

Related Issues

• lib/fips140: freeze FIPS 140-3 module v2.0.0-rc.1 #76769
• crypto/fips140: add Version #75301 (closed)

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