Silent failure on certain store issues

[lengau]

Bug Description

During transient store issues (i.e. 500-series HTTP errors), we don't error out as expected.

To Reproduce

Set up a fake store 🙃 that always returns 500 errors and run craft_parts.packages.snaps.SnapPackage("any-name").get_store_snap_info()

Expected result:

Errors out when getting the info

Actual result:

Just returns no snap info

part yaml

plugin: go
source: .
source-type: local    
build-snaps:
 - go/1.21/stable

Relevant log output

[From snapcraft]

2024-05-27 21:41:21.556 :: 2024-05-27 21:34:40.843 ignore patterns: ['*.snap']
2024-05-27 21:41:21.556 :: 2024-05-27 21:34:40.843 Installing build-packages
2024-05-27 21:41:21.556 :: 2024-05-27 21:34:40.844 Installing build-snaps
2024-05-27 21:41:21.556 :: 2024-05-27 21:35:20.892 The http error when checking the store for core22 is 500 (retries left 5)
2024-05-27 21:41:21.556 :: 2024-05-27 21:36:00.933 The http error when checking the store for core22 is 500 (retries left 4)
2024-05-27 21:41:21.556 :: 2024-05-27 21:36:40.967 The http error when checking the store for core22 is 500 (retries left 3)
2024-05-27 21:41:21.556 :: 2024-05-27 21:37:20.995 The http error when checking the store for core22 is 500 (retries left 2)
2024-05-27 21:41:21.556 :: 2024-05-27 21:38:01.017 The http error when checking the store for core22 is 500 (retries left 1)
2024-05-27 21:41:21.556 :: 2024-05-27 21:38:41.043 The http error when checking the store for go is 500 (retries left 5)
2024-05-27 21:41:21.556 :: 2024-05-27 21:39:21.073 The http error when checking the store for go is 500 (retries left 4)
2024-05-27 21:41:21.556 :: 2024-05-27 21:40:01.086 The http error when checking the store for go is 500 (retries left 3)
2024-05-27 21:41:21.556 :: 2024-05-27 21:40:41.102 The http error when checking the store for go is 500 (retries left 2)
2024-05-27 21:41:21.556 :: 2024-05-27 21:41:21.116 The http error when checking the store for go is 500 (retries left 1)
2024-05-27 21:41:21.556 :: 2024-05-27 21:41:21.121 verify plugin environment for part '********'
2024-05-27 21:41:21.556 :: 2024-05-27 21:41:21.124 plugin validation environment: # Environment
2024-05-27 21:41:21.556 :: ## Application environment
// continues as normal, errors out because we don't have go