Bug 2180914

Cloned from upstream: https://pagure.io/freeipa/issue/9349

### Issue
Issues have been found for group_add sequence processing with server context with the work on https://github.com/freeipa/ansible-freeipa/pull/1001

1) Using group_add in sequence processing to create several groups where one is external, all groups have objectclass ipaexternalgroup, even if external is set to False for the group_add command.
2) After creating a nonposix group, all following group_add calls to add posix groups calls are failing with `missing attribute "gidNumber" required by object class "posixGroup"`

#### Reproducer 1 (external)

    from ipalib import api, errors

    api.bootstrap_with_global_options(context='server')
    api.finalize()
    if api.env.in_server:
        api.Backend.ldap2.connect()
    else:
        api.Backend.rpcclient.connect()

    print("Remove 'testgroup1'")
    try:
        api.Command["group_del"]("testgroup1")
    except errors.NotFound:
        pass

    print("Remove 'testgroup2'")
    try:
        api.Command["group_del"]("testgroup2")
    except errors.NotFound:
        pass

    print("Create 'testgroup1' with external=True")
    api.Command["group_add"]("testgroup1", external=True)

    print("Create 'testgroup2' with external=False")
    api.Command["group_add"]("testgroup2", external=False)

    result1 = api.Command["group_show"]("testgroup1", all=True)["result"]
    print("'testgroup1' userclass: %s" % repr(result1["objectclass"]))

    result2 = api.Command["group_show"]("testgroup2", all=True)["result"]
    print("'testgroup2' userclass: %s" % repr(result2["objectclass"]))


#### Reproducer 2 (nonposix)

    from ipalib import api, errors

    api.bootstrap_with_global_options(context='server')
    api.finalize()
    if api.env.in_server:
        api.Backend.ldap2.connect()
    else:
        api.Backend.rpcclient.connect()

    print("Remove 'testgroup1'")
    try:
        api.Command["group_del"]("testgroup1")
    except errors.NotFound:
        pass

    print("Remove 'testgroup2'")
    try:
        api.Command["group_del"]("testgroup2")
    except errors.NotFound:
        pass

    print("Remove 'testgroup3'")
    try:
        api.Command["group_del"]("testgroup3")
    except errors.NotFound:
        pass

    print("Create 'testgroup1' with nonposix=False")
    api.Command["group_add"]("testgroup1", nonposix=False)

    try:
        print("Create 'testgroup2' with nonposix=True")
        api.Command["group_add"]("testgroup2", nonposix=True)
    except Exception as e:
        print(str(e))

    try:
        print("Create 'testgroup3' with external=True")
        api.Command["group_add"]("testgroup3", external=True)
    except Exception as e:
        print(str(e))

#### Actual behavior
1) With reproducer 1 all groups are external.

    $ python3 external_test.py 
    Remove 'testgroup1'
    Remove 'testgroup2'
    Create 'testgroup1' with external=True
    Create 'testgroup2' with external=False
    'testgroup1' userclass: ['top', 'groupofnames', 'nestedgroup', 'ipausergroup', 'ipaobject', 'ipaexternalgroup']
    'testgroup2' userclass: ['top', 'groupofnames', 'nestedgroup', 'ipausergroup', 'ipaobject', 'ipaexternalgroup', 'posixgroup', 'ipantgroupattrs']


2) Reproducer 2 fails to create posix groups after nonposix group has been created.

    $ python3 nonposix_test.py 
    Remove 'testgroup1'
    Remove 'testgroup2'
    Remove 'testgroup3'
    Create 'testgroup1' with nonposix=False
    Create 'testgroup2' with nonposix=True
    missing attribute "gidNumber" required by object class "posixGroup"
    Create 'testgroup3' with external=True
    missing attribute "gidNumber" required by object class "posixGroup"

2) Reproducer 2 fails to create posix groups after nonposix group has been created.

#### Expected behavior
No issues.

#### Version/Release/Distribution

    $ rpm -q freeipa-server freeipa-client ipa-server ipa-client 389-ds-base pki-ca krb5-server
    freeipa-server-4.9.9-1.fc36.x86_64
    freeipa-client-4.9.9-1.fc36.x86_64
    package ipa-server is not installed
    package ipa-client is not installed
    389-ds-base-2.1.1-2.fc36.x86_64
    package pki-ca is not installed
    krb5-server-1.19.2-6.fc36.x86_64

### Addititional Information
The reproducers are passing using client context.