Use Go bugfix version in go.mod directives

[pgimalac]

What does this PR do?

Update all go.mod files to use the bugfix Go version (1.21.7) instead of the minor version (1.21).

Motivation

It is preventing importing dependencies with a bugfix version set (ie. we can't import a dependency using 1.21.0 for example, this is forcing us to add the bugfix)

Additional Notes

Possible Drawbacks / Trade-offs

Describe how to test/QA your changes

[GustavoCaso]

Should we update the docker files and the other places we reference 1.21?

[pr-commenter[bot]]

Bloop Bleep... Dogbot Here

Regression Detector Results

Run ID: 005ee896-217f-46b2-9200-da3eb38f8ee0 Baseline: fced5cf5c89d4e379117224aa019434ac5e58375 Comparison: f1b5888aa48ea06a9e8dc285c854602317bbd5a0 Total CPUs: 7

Performance changes are noted in the perf column of each table:

• ✅ = significantly better comparison variant performance
• ❌ = significantly worse comparison variant performance
• ➖ = no significant change in performance

No significant changes in experiment optimization goals

Confidence level: 90.00% Effect size tolerance: |Δ mean %| ≥ 5.00%

There were no significant changes in experiment optimization goals at this confidence level and effect size tolerance.

Experiments ignored for regressions

Regressions in experiments with settings containing erratic: true are ignored.

perf	experiment	goal	Δ mean %	Δ mean % CI
➖	file_to_blackhole	% cpu utilization	-0.05	[-6.62, +6.51]

Fine details of change detection per experiment

perf	experiment	goal	Δ mean %	Δ mean % CI
➖	uds_dogstatsd_to_api_cpu	% cpu utilization	+1.63	[+0.19, +3.06]
➖	tcp_syslog_to_blackhole	ingress throughput	+0.42	[+0.36, +0.48]
➖	process_agent_standard_check	memory utilization	+0.23	[+0.20, +0.27]
➖	otel_to_otel_logs	ingress throughput	+0.20	[-0.41, +0.82]
➖	trace_agent_json	ingress throughput	+0.05	[+0.01, +0.08]
➖	trace_agent_msgpack	ingress throughput	+0.02	[+0.01, +0.03]
➖	uds_dogstatsd_to_api	ingress throughput	+0.00	[-0.00, +0.00]
➖	tcp_dd_logs_filter_exclude	ingress throughput	+0.00	[-0.00, +0.00]
➖	file_tree	memory utilization	-0.03	[-0.11, +0.04]
➖	file_to_blackhole	% cpu utilization	-0.05	[-6.62, +6.51]
➖	idle	memory utilization	-0.08	[-0.11, -0.04]
➖	process_agent_real_time_mode	memory utilization	-0.14	[-0.17, -0.11]
➖	process_agent_standard_check_with_stats	memory utilization	-0.37	[-0.40, -0.33]

Explanation

A regression test is an A/B test of target performance in a repeatable rig, where "performance" is measured as "comparison variant minus baseline variant" for an optimization goal (e.g., ingress throughput). Due to intrinsic variability in measuring that goal, we can only estimate its mean value for each experiment; we report uncertainty in that value as a 90.00% confidence interval denoted "Δ mean % CI".

For each experiment, we decide whether a change in performance is a "regression" -- a change worth investigating further -- if all of the following criteria are true:

1. Its estimated |Δ mean %| ≥ 5.00%, indicating the change is big enough to merit a closer look.

2. Its 90.00% confidence interval "Δ mean % CI" does not contain zero, indicating that if our statistical model is accurate, there is at least a 90.00% chance there is a difference in performance between baseline and comparison variants.

3. Its configuration does not mark it "erratic".

[pgimalac]

/merge

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Tests failed on this commit cc1ac31

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Details

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[brycekahle]

I think this is failing because https://github.com/DataDog/datadog-lambda-extension/blob/23357637625a986f53bdc218c43c9c52656156d5/scripts/Dockerfile.alpine.build#L10 is still using Go 1.20, which cannot parse go 1.21.7 from the go.mod: go.mod:3: invalid go version '1.21.7': must match format 1.23

[pgimalac]

Thanks @brycekahle I believe you are right, I opened a PR in that repo to bump the Go version 👍

[pgimalac]

/merge

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