Improve benchmark running on github

[tigrannajaryan]

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Go Benchstat report

goos: linux
goarch: amd64
pkg: github.com/splunk/stef/benchmarks
cpu: AMD EPYC 7763 64-Core Processor                
                                 │ bench_base.txt │          bench_current.txt          │
                                 │     sec/op     │   sec/op     vs base                │
SerializeNative/STEF/serialize-4      10.72m ± 2%   10.80m ± 2%       ~ (p=0.255 n=100)
DeserializeNative/STEF/deser-4        2.420m ± 0%   2.506m ± 0%  +3.53% (p=0.000 n=100)
geomean                               5.094m        5.202m       +2.13%

                                 │ bench_base.txt │          bench_current.txt          │
                                 │   sec/point    │  sec/point   vs base                │
SerializeNative/STEF/serialize-4      160.3n ± 2%   161.6n ± 2%       ~ (p=0.222 n=100)
DeserializeNative/STEF/deser-4        36.21n ± 0%   37.48n ± 0%  +3.52% (p=0.000 n=100)
geomean                               76.19n        77.84n       +2.16%

                                 │ bench_base.txt │           bench_current.txt            │
                                 │      B/op      │     B/op      vs base                  │
SerializeNative/STEF/serialize-4     3.338Mi ± 0%   3.340Mi ± 0%  +0.08% (p=0.021 n=100)
DeserializeNative/STEF/deser-4       951.4Ki ± 0%   951.4Ki ± 0%       ~ (p=1.000 n=100) ¹
geomean                              1.761Mi        1.762Mi       +0.04%
¹ all samples are equal

                                 │ bench_base.txt │           bench_current.txt           │
                                 │   allocs/op    │  allocs/op   vs base                  │
SerializeNative/STEF/serialize-4      2.652k ± 0%   2.658k ± 0%  +0.21% (p=0.021 n=100)
DeserializeNative/STEF/deser-4         463.0 ± 0%    463.0 ± 0%       ~ (p=1.000 n=100) ¹
geomean                               1.108k        1.109k       +0.10%
¹ all samples are equal