Remove editable install flags from dev_requirements.txt

[Copilot]

Pylint fails to resolve imports when local dependencies are installed with -e (editable mode) in dev_requirements.txt, causing false positive import-error warnings.

Changes

Removed -e prefix from local package dependencies in dev_requirements.txt files:

- -e ../../core/azure-core
+ ../../core/azure-core
- -e ../../identity/azure-identity  
+ ../../identity/azure-identity

Preserved -e for:

• azure-sdk-tools (requires editable mode)
• tests/* paths (test utilities)

Scope

• 125 dev_requirements.txt files modified
• 217 editable flags removed

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Original prompt

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This section details on the original issue you should resolve

<issue_title>[pylint] remove editable installs</issue_title>
<issue_description>When running pylint locally if a dependency on that package is editably installed in de_reqs we receive (import-error) on all the import statements

ie. from azure.core import ..... (import-error) azure core doesn't exist

to fix this we can remove all the -e from the dev-req installations</issue_description>

<agent_instructions>For all dev_requirements.txt files under sdk/*, remove the -e flag for editable installs strictly based on this criteria:

• Do NOT remove the flag for requirements under tests/* directories, or for anything with azure-sdk-tools. For example, this should be left alone -e tests/specs_sdk/modeltypes
• DO remove the flag for anything else, for example -e ../../core/azure-core should not have the -e flag.

DO NOT change any other aspects of the requirements files.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes [pylint] remove editable installs #44916

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[l0lawrence]

@scbedd Would we want to do no-ci on this?