Refactor golang tests using openssl

[claucece]

The TLS reference tests run a connection against a reference implementation: OpenSSL of TLS and record the bytes of the resulting connection. The command is basically:

bin/go test -v ./src/crypto/tls/... -update

It needs openssl version 1.1, which is sometimes checked by using the checkOpenSSLVersion func.
As that function explains, in order to run the tests, it is needed to install openssl from source and configure it with enable-weak-ssl-ciphers option. It is also needed to install it somewhere that is not replacing the Openssl that comes with the OS, as this can create problems for other applications using openssl: openssl/openssl#9268, so you will want to change the prefix and --openssldir flags accordingly.

On some architectures, it seems that is also needed to configure it with no-shared option, as seen here: https://github.com/thomwiggers/go-1/commit/7c8eefb03cda32c7987b31357d22a8d5d39b5d71 .

Running the -update on the tests sometimes makes them hang or sometimes the code is unable to find the openssl command.

After some examination, it seems that the test that specifically needs all of this is: 5781fef for the deprecated RSA-RC4.

Perhaps, we can do better than this by having a formula or a place to get openssl1.1 correctly configured to run the command. Perhaps, we only need that for the RSA-RC4 case.

[claucece]

cc./ @chris-wood

[claucece]

I also added some of my findings to the wiki: https://github.com/cloudflare/go/wiki/Starting-out#how-to-regenerate-the-tls-testdata

[armfazh]

one way to enforce OpenSSL runs from the build directory is by specifying the full path in openssl command.

$ ./Cofingure --prefix=/tmp/installOSSL
$ make 
$ make install

so you can verify that the openssl binary actually uses the recently-compiled libraries (and not the ones form file system) by specifying the LD_LIBRARYP_PATH environment variable.

$ LD_LIBRARY_PATH=/tmp/installOSSL/lib  ldd /tmp/installOSSL/bin/openssl
	linux-vdso.so.1 (0x00007ffed1faf000)
	libssl.so.3 => ./lib/libssl.so.3 (0x00007fab45329000)
	libcrypto.so.3 => ./lib/libcrypto.so.3 (0x00007fab44ce4000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fab44ac5000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fab446d4000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fab444d0000)
	/lib64/ld-linux-x86-64.so.2 (0x00007fab458b7000)

[claucece]

I'll be checking this here: https://github.com/claucece/go-exp