test lax validation of extended key usage

[toidiu]

Description of changes:

Added extension to the tests/pems/permutations/rsae_pkcs_2048_sha256/server-chain.pem

Extension SEQUENCE (3 elem)
    extnID OBJECT IDENTIFIER 2.5.29.37 extKeyUsage (X.509 extension)
    critical BOOLEAN true
    extnValue OCTET STRING (12 byte) 300A06082B06010505070303
        SEQUENCE (1 elem)
            OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.3 codeSigning (PKIX key purpose)

Call-outs:

Address any potentially confusing code. Is there code added that needs to be cleaned up later? Is there code that is missing because it’s still in development?

Testing:

How is this change tested (unit tests, fuzz tests, etc.)? Are there any testing steps to be verified by the reviewer?

Is this a refactor change? If so, how have you proved that the intended behavior hasn't changed?

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