Check on GLIBC requirements

[dio]

This makes sure we can run on lte GLIBC_2.28. This adds a test using objdump -T (scripted in Go) to check the GLIBC version.

Supersedes #218.

Signed-off-by: Dhi Aurrahman [email protected]

[dio]

/assign @incfly

[dio]

@incfly you can download the zip file on: https://github.com/istio-ecosystem/authservice/actions/runs/2094663257 (I uploaded the binary as an artifact), then you can validate it inside the ubi8 image.

$ # unzip the downloaded zip file
$ chmod +x /path/to/auth_server.stripped
$ docker run --rm -it -v /path/to/auth_server.stripped:/usr/local/bin/auth_server registry.access.redhat.com/ubi8/ubi:8.5-236.1648460182 ldd /usr/local/bin/auth_server
        linux-vdso.so.1 (0x00007ffe440c9000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f3665461000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f3665241000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f3664e7c000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f36657e3000)

[istio-testing]

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