ARROW-18309: [Go] Fix delta bit packing decode panic

[zeroshade]

No description provided.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-18309

[github-actions]

⚠️ Ticket has not been started in JIRA, please click 'Start Progress'.

[ursabot]

Benchmark runs are scheduled for baseline = b4a8320 and contender = e381414. e381414 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Finished ⬇️0.0% ⬆️0.0%] ec2-t3-xlarge-us-east-2
[Failed ⬇️0.17% ⬆️0.0%] test-mac-arm
[Finished ⬇️0.27% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.1% ⬆️0.03%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] e3814142 ec2-t3-xlarge-us-east-2
[Finished] e3814142 test-mac-arm
[Finished] e3814142 ursa-i9-9960x
[Finished] e3814142 ursa-thinkcentre-m75q
[Finished] b4a83208 ec2-t3-xlarge-us-east-2
[Failed] b4a83208 test-mac-arm
[Finished] b4a83208 ursa-i9-9960x
[Finished] b4a83208 ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java