Go 1.24 breaks tests TestGH664 and TestGH840

[gibmat]

Describe the bug

With go 1.24, lestrrat-go/jwx 2.1.3 experiences two test failures:

=== RUN   TestGH664
=== RUN   TestGH664/Check_what_happens_when_primes_are_reduced_to_0
    jwk_test.go:2119: 
                Error Trace:    /build/golang-github-lestrrat-go-jwx-2.1.3/_build/src/github.com/lestrrat-go/jwx/jwk/jwk_test.go:2119
                Error:          Received unexpected error:
                                failed to generate signature for signer #0 (alg=RS256): failed to sign payload: modulus must be > 1
                Test:           TestGH664/Check_what_happens_when_primes_are_reduced_to_0
                Messages:       jws.Sign should succeed
=== RUN   TestGH664/Check_what_happens_when_primes_are_reduced_to_1
    jwk_test.go:2119: 
                Error Trace:    /build/golang-github-lestrrat-go-jwx-2.1.3/_build/src/github.com/lestrrat-go/jwx/jwk/jwk_test.go:2119
                Error:          Received unexpected error:
                                failed to generate signature for signer #0 (alg=RS256): failed to sign payload: modulus must be > 1
                Test:           TestGH664/Check_what_happens_when_primes_are_reduced_to_1
                Messages:       jws.Sign should succeed
=== RUN   TestGH664/Check_what_happens_when_primes_are_reduced_to_2
--- FAIL: TestGH664 (0.16s)
    --- FAIL: TestGH664/Check_what_happens_when_primes_are_reduced_to_0 (0.00s)
    --- FAIL: TestGH664/Check_what_happens_when_primes_are_reduced_to_1 (0.00s)
    --- PASS: TestGH664/Check_what_happens_when_primes_are_reduced_to_2 (0.00s)

=== RUN   TestGH840
    jws_test.go:1620:
                Error Trace:    /build/golang-github-lestrrat-go-jwx-2.1.3/_build/src/github.com/lestrrat-go/jwx/jws/jws_test.go:1620
                Error:          Received unexpected error:
                                failed to serialize token at step #2: failed to generate signature for signer #0 (alg=ES256): failed to sign payload: failed to sign payload using ecdsa: P256 point not on curve
                Test:           TestGH840
                Messages:       jwt.Sign should succeed
--- FAIL: TestGH840 (0.00s)

To Reproduce / Expected behavior
Run the tests under go 1.24; they previously passed with go 1.23.

Additional context
The go 1.24 release notes mention internal changes to the crypto modules to support FIPS algorithms. The TestGH664 failure seems to be caused by this change; not sure about the TestGH840 failure.