switch to Go 1.17

[davies]

Go 1.18 is released and 1.16 is also deprecated, we should upgrade it to 1.17.

[codecov-commenter]

Codecov Report

Merging #1594 (23c2b04) into main (f78f922) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1594      +/-   ##
==========================================
- Coverage   61.33%   61.26%   -0.07%     
==========================================
  Files         133      133              
  Lines       22424    22424              
==========================================
- Hits        13753    13738      -15     
- Misses       7113     7125      +12     
- Partials     1558     1561       +3     

Impacted Files	Coverage Δ
pkg/chunk/utils_unix.go	73.33% <0.00%> (-20.00%)	⬇️
pkg/vfs/reader.go	81.56% <0.00%> (-3.11%)	⬇️
pkg/meta/sql.go	67.13% <0.00%> (ø)
pkg/meta/redis.go	72.99% <0.00%> (+0.22%)	⬆️

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