Add message if conflicting contract on dependency install

[chasefleming]

Closes #1560

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For contributor use:

• [x] Targeted PR against master branch
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [ ] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 41.37931% with 17 lines in your changes are missing coverage. Please review.

Project coverage is 39.66%. Comparing base (3b93072) to head (0c72153).

Files	Patch %	Lines
internal/dependencymanager/dependencyinstaller.go	41.37%	14 Missing and 3 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1561 +/- ## ========================================== - Coverage 39.71% 39.66% -0.06% ========================================== Files 51 51 Lines 3278 3300 +22 ========================================== + Hits 1302 1309 +7 - Misses 1814 1826 +12 - Partials 162 165 +3 ``` | [Flag](https://app.codecov.io/gh/onflow/flow-cli/pull/1561/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=onflow) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/onflow/flow-cli/pull/1561/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=onflow) | `39.66% <41.37%> (-0.06%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=onflow#carryforward-flags-in-the-pull-request-comment) to find out more.

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[sentry-io[bot]]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ unknown chain: `` View Issue

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