Share experiment fails if no remote specified in repo

[shcheklein]

If remote storage is not specified:

[version: 0.5.7, 2022-10-30T19:57:04.192Z, pid: 65281] > /Users/ivan/Projects/ensemble-dvc-template/.venv/bin/python -m dvc push - FAILED with code 1 (236ms)
�[31mERROR�[39m: failed to push data to the cloud - config file error: no remote specified. Create a default remote with
    dvc remote add -d <remote name> <remote url>

while trying to "Share as Branch"

Extension: v0.5.7
DVC:

DVC version: 2.32.0 (pip)
---------------------------------
Platform: Python 3.9.13 on macOS-12.6-arm64-arm-64bit
Subprojects:
        dvc_data = 0.22.0
        dvc_objects = 0.11.0
        dvc_render = 0.0.12
        dvc_task = 0.1.4
        dvclive = 0.12.1.dev8+g243ae28.d20221030
        scmrepo = 0.1.2
Supports:
        http (aiohttp = 3.8.3, aiohttp-retry = 2.8.3),
        https (aiohttp = 3.8.3, aiohttp-retry = 2.8.3)
Cache types: reflink, hardlink, symlink
Cache directory: apfs on /dev/disk3s1s1
Caches: local
Remotes: None
Workspace directory: apfs on /dev/disk3s1s1
Repo: dvc, git

[shcheklein]

We can include also better handing of any remote / Git errors during the process. Dmitry's feedback was about this as well.

[shcheklein]

Closing in favor of #3574