all: upgrade go version to 1.17
all: upgrade go version to 1.17

This enables module graph pruning, which also helps to show which
parts of this module's (fairly large) module graph are actually
relevant to the module.

Change-Id: Ica2bbc07df885a54b103f72d0ccc156f5506f639
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/370975
Trust: Bryan Mills <1c8aad60184261ccede67f5c63a0d2a3bf3c9ff4@google.com>
Run-TryBot: Bryan Mills <1c8aad60184261ccede67f5c63a0d2a3bf3c9ff4@google.com>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Michael Knyszek <4473450dc5c88f06e1fb787f303d7805ec2aee65@google.com>

golang/benchmarks,golang/benchmarks