update golangci-lint to v2.10.1

[Luap99]

The older version does not support go 1.26 but the workflow installs go 1.26 as it ask for the stable go version. Therefore CI fails currently. Fix this by updating golangci-lint to the latest version which does support go 1.26.

[Luap99]

Looks like we have a nasty flake, took 5 tries to get the one job passing

https://github.com/coreos/go-systemd/actions/runs/22762902976/attempts/4?pr=513

+ docker exec --privileged 403f10766dcc2c0fc1f2b48e3195e0c3adc18801299d617aa93cd88894b992fa /bin/bash -e -c 'cd /src; ./scripts/ci-runner.sh build_tests'
Building tests...
  - activation
internal/byteorder: open /tmp/go-build3549252721/b014/_pkg_.a: no such file or directory
# internal/abi
asm: open $WORK/b006/symabis: no such file or directory
# internal/godebugs
compile: -importcfg: open $WORK/b016/importcfg: no such file or directory
# runtime/internal/math
/usr/local/go/src/runtime/internal/math/math.go:7:8: could not import internal/goarch (open $WORK/b007/_pkg_.a: no such file or directory)
# runtime/internal/sys
/usr/local/go/src/runtime/internal/sys/consts.go:8:2: could not import internal/goarch (open $WORK/b007/_pkg_.a: no such file or directory)
# internal/cpu
can't create $WORK/b012/_pkg_.a: open $WORK/b012/_pkg_.a: no such file or directory
internal/goarch: open /tmp/go-build3549252721/b007/vet.cfg: no such file or directory
internal/coverage/rtcov: open /tmp/go-build3549252721/b015/vet.cfg: no such file or directory
internal/unsafeheader: open /tmp/go-build3549252721/b009/vet.cfg: no such file or directory

Seems to be a race condition when compiling go programs?!

[Luap99]

replaced by #515

[kolyshkin]

Looks like we have a nasty flake, took 5 tries to get the one job passing

https://github.com/coreos/go-systemd/actions/runs/22762902976/attempts/4?pr=513

+ docker exec --privileged 403f10766dcc2c0fc1f2b48e3195e0c3adc18801299d617aa93cd88894b992fa /bin/bash -e -c 'cd /src; ./scripts/ci-runner.sh build_tests'
Building tests...
  - activation
internal/byteorder: open /tmp/go-build3549252721/b014/_pkg_.a: no such file or directory
# internal/abi
asm: open $WORK/b006/symabis: no such file or directory
# internal/godebugs
compile: -importcfg: open $WORK/b016/importcfg: no such file or directory
# runtime/internal/math
/usr/local/go/src/runtime/internal/math/math.go:7:8: could not import internal/goarch (open $WORK/b007/_pkg_.a: no such file or directory)
# runtime/internal/sys
/usr/local/go/src/runtime/internal/sys/consts.go:8:2: could not import internal/goarch (open $WORK/b007/_pkg_.a: no such file or directory)
# internal/cpu
can't create $WORK/b012/_pkg_.a: open $WORK/b012/_pkg_.a: no such file or directory
internal/goarch: open /tmp/go-build3549252721/b007/vet.cfg: no such file or directory
internal/coverage/rtcov: open /tmp/go-build3549252721/b015/vet.cfg: no such file or directory
internal/unsafeheader: open /tmp/go-build3549252721/b009/vet.cfg: no such file or directory

Seems to be a race condition when compiling go programs?!

Seeing a similar failure when building Go tests:

+ docker exec --privileged 3af3363f4fe6554efe0758e8a841d6f8186d726850468922bd6b1c470c970014 /bin/bash -e -c 'cd /src; ./scripts/ci-runner.sh build_tests'
Building tests...
  - activation
github.com/coreos/go-systemd/v22/activation.test: open /tmp/go-build4063755751/b001/importcfg: no such file or directory

It looks like someone removes /tmp while go compiles code. My guess it's systemd.

I think that sleep 10s (initially added as sleep 30s in commit 07d38cb) in ci-runner.sh was previously helping with that. As much as I hate such kludges, maybe we need to move it to before building tests.

Opened #516 to fix.