Improve query sorting

[philippgille]

slices.SortFunc is recommended over sort.Slice and more performant.

Query duration decreased ~17% in our benchmark:

goos: linux
goarch: amd64
pkg: github.com/philippgille/chromem-go
cpu: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
                                    │    after     │               after2                │
                                    │    sec/op    │    sec/op     vs base               │
Collection_Query_NoContent_100-8      109.9µ ±  1%   106.3µ ±  2%   -3.23% (p=0.002 n=6)
Collection_Query_NoContent_1000-8     536.8µ ±  1%   490.7µ ±  1%   -8.60% (p=0.002 n=6)
Collection_Query_NoContent_5000-8     4.985m ± 15%   2.704m ±  5%  -45.76% (p=0.002 n=6)
Collection_Query_NoContent_25000-8    14.97m ± 10%   13.17m ± 11%  -11.99% (p=0.004 n=6)
Collection_Query_NoContent_100000-8   56.50m ± 11%   51.86m ± 13%   -8.21% (p=0.041 n=6)
Collection_Query_100-8                110.0µ ±  0%   106.8µ ±  0%   -2.91% (p=0.002 n=6)
Collection_Query_1000-8               536.8µ ±  0%   489.7µ ±  0%   -8.78% (p=0.002 n=6)
Collection_Query_5000-8               4.869m ±  5%   2.704m ±  6%  -44.46% (p=0.002 n=6)
Collection_Query_25000-8              15.01m ±  3%   13.05m ±  2%  -13.09% (p=0.002 n=6)
Collection_Query_100000-8             56.48m ±  4%   52.07m ±  5%   -7.81% (p=0.002 n=6)
geomean                               3.008m         2.492m        -17.13%

                                    │    after     │               after2               │
                                    │     B/op     │     B/op      vs base              │
Collection_Query_NoContent_100-8      6.330Ki ± 0%   6.235Ki ± 0%  -1.50% (p=0.002 n=6)
Collection_Query_NoContent_1000-8     34.83Ki ± 0%   34.74Ki ± 0%  -0.26% (p=0.002 n=6)
Collection_Query_NoContent_5000-8     162.8Ki ± 0%   162.7Ki ± 0%  -0.05% (p=0.002 n=6)
Collection_Query_NoContent_25000-8    794.8Ki ± 0%   794.7Ki ± 0%  -0.01% (p=0.002 n=6)
Collection_Query_NoContent_100000-8   3.057Mi ± 0%   3.057Mi ± 0%  -0.00% (p=0.002 n=6)
Collection_Query_100-8                6.329Ki ± 0%   6.234Ki ± 0%  -1.49% (p=0.002 n=6)
Collection_Query_1000-8               34.83Ki ± 0%   34.74Ki ± 0%  -0.26% (p=0.002 n=6)
Collection_Query_5000-8               162.8Ki ± 0%   162.7Ki ± 0%  -0.06% (p=0.002 n=6)
Collection_Query_25000-8              794.8Ki ± 0%   794.7Ki ± 0%  -0.01% (p=0.002 n=6)
Collection_Query_100000-8             3.057Mi ± 0%   3.057Mi ± 0%       ~ (p=0.065 n=6)
geomean                               155.0Ki        154.4Ki       -0.37%

                                    │   after    │              after2              │
                                    │ allocs/op  │ allocs/op   vs base              │
Collection_Query_NoContent_100-8      44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_NoContent_1000-8     44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_NoContent_5000-8     44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_NoContent_25000-8    44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_NoContent_100000-8   44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_100-8                44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_1000-8               44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_5000-8               44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_25000-8              44.00 ± 0%   41.00 ± 0%  -6.82% (p=0.002 n=6)
Collection_Query_100000-8             44.00 ± 0%   41.50 ± 1%  -5.68% (p=0.002 n=6)
geomean                               44.00        41.05       -6.71%