feat: Upgrade Python dependency edx-enterprise

[iloveagent57]

feat: add an endpoint to create a customer admin user

Commit generated by workflow openedx/edx-platform/.github/workflows/upgrade-one-python-dependency.yml@refs/heads/master

Description

Describe what this pull request changes, and why. Include implications for people using this change.
Design decisions and their rationales should be documented in the repo (docstring / ADR), per
OEP-19, and can be
linked here.

Useful information to include:

• Which edX user roles will this change impact? Common user roles are "Learner", "Course Author",
  "Developer", and "Operator".
• Include screenshots for changes to the UI (ideally, both "before" and "after" screenshots, if applicable).
• Provide links to the description of corresponding configuration changes. Remember to correctly annotate these
  changes.

Supporting information

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Other information

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• Does this change depend on other changes elsewhere?
• Any special concerns or limitations? For example: deprecations, migrations, security, or accessibility.
• If your database migration can't be rolled back easily.

[Copilot]

Pull Request Overview

This PR upgrades the edx-enterprise Python dependency from version 6.4.4 to 6.5.0 across all requirement files to add an endpoint for creating customer admin users.

• Updates edx-enterprise version constraint from 6.4.4 to 6.5.0
• Ensures version consistency across all environment configurations (base, development, testing, documentation)

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
requirements/constraints.txt	Updates the pinned version constraint for edx-enterprise
requirements/edx/base.txt	Updates edx-enterprise version in base requirements
requirements/edx/development.txt	Updates edx-enterprise version in development requirements
requirements/edx/doc.txt	Updates edx-enterprise version in documentation requirements
requirements/edx/testing.txt	Updates edx-enterprise version in testing requirements

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