feat: Improve account loading errors

[arthurpitman]

Found while investigating #1666, this PR:

• reduces the complexity of load(...)
• ensures file name is included in errors while loading account resources
• corrects two typos in error messages

[github-actions]

Unit Test Results

1 964 tests  ±0   1 963 ✅ ±0   54s ⏱️ -1s
  135 suites ±0       1 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit a002c32. ± Comparison against base commit e8c4e07.

♻️ This comment has been updated with latest results.

[github-actions]

E2E Test Results

1 files   -     4  1 suites   - 406   11m 17s ⏱️ - 56m 28s
2 tests  - 2 083  2 ✅  - 2 081  0 💤  - 2  0 ❌ ±0 
2 runs   - 2 387  2 ✅  - 2 385  0 💤  - 2  0 ❌ ±0 

Results for commit a344c2e. ± Comparison against base commit 934c05b.

This pull request removes 2085 and adds 2 tests. Note that renamed tests count towards both.

github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/account ‑ TestLoadResources
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/account ‑ TestLoadResources_Duplicates
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/account ‑ TestLoadResources_Duplicates/Load_Resources_-_duplicate_group
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/account ‑ TestLoadResources_Duplicates/Load_Resources_-_duplicate_policy
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/account ‑ TestLoadResources_Duplicates/Load_Resources_-_duplicate_user
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/convert ‑ TestConvert_FailsIfThereIsJustEmptyProjects
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/convert ‑ TestConvert_RemovesEscapeCharsAsV2AutoEscapes
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/convert ‑ TestConvert_WorksIfNoDeleteYamlExists
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/convert ‑ TestConvert_WorksOnFullConfiguration
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/convert ‑ TestCopyDeleteFileIfPresent
…

github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/integrationtest/account ‑ TestDeployAndDelete_AllResources
github.com/dynatrace/dynatrace-configuration-as-code/v2/cmd/monaco/integrationtest/account ‑ TestIdempotenceOfDeployment

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud