[16.0][BKP] webservice_server_env: make server_environment an optional dependency

[yankinmax]

This is a backport of:

• [17.0][BKP] webservice_server_env: make server_environment an optional dependency #153

Depends on:

• [IMP] server_environment: module uninstallation server-env#276

[OCA-git-bot]

Hi @etobella,
some modules you are maintaining are being modified, check this out!

[yankinmax]

To be able to fix the issue we need to merge the dependencies, because they're conflicting now:

ERROR: Cannot install odoo-addon-server-environment 16.0.1.1.2.6 (from git+https://github.com/OCA/server-env.git@refs/pull/276/head#subdirectory=setup/server_environment) and odoo-addon-server-environment 16.0.1.1.2.6 (from git+https://github.com/OCA/server-env.git@refs/pull/287/head#subdirectory=setup/server_environment) because these package versions have conflicting dependencies.

The conflict is caused by:
    The user requested odoo-addon-server-environment 16.0.1.1.2.6 (from git+https://github.com/OCA/server-env.git@refs/pull/276/head#subdirectory=setup/server_environment)
    The user requested odoo-addon-server-environment 16.0.1.1.2.6 (from git+https://github.com/OCA/server-env.git@refs/pull/287/head#subdirectory=setup/server_environment)

Or any other ideas?