[BUG] miss makezero in slice init

[alingse]

Agent Environment

Describe what happened:

I was running github actions to run linter makezero for top github golang repos.

see issues alingse/go-linter-runner#1

and the github actions output https://github.com/alingse/go-linter-runner/actions/runs/9242970601/job/25426486285

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append to slice `customContextTags` with non-zero initialized length at https://github.com/DataDog/datadog-agent/blob/main/pkg/util/profiling/profiling.go#L80:24
append to slice `readers` with non-zero initialized length at https://github.com/DataDog/datadog-agent/blob/main/pkg/network/usm/sharedlibraries/testutil/fmapper/fmapper.go#L36:13
====================================================================================================

the customContextTags := make([]string, len(settings.CustomAttributes)) should be customContextTags := make([]string, 0, len(settings.CustomAttributes))

the readers := make([]*mmap.ReaderAt, len(os.Args)-1) should be readers := make([]*mmap.ReaderAt, 0, len(os.Args)-1)

Describe what you expected:

Steps to reproduce the issue:

Additional environment details (Operating System, Cloud provider, etc):

[L3n41c]

Hello @alingse,

Thanks for bringing those bugs to our attention !
The fixes for the two of them have now been merged.