Inform users about what devifle was used to create a workspace with the factory

[skabashnyuk]

Description

Since we may support different devfile names like: .devfile , devfile, Devfile, devfile.yaml, and because if devfile does not exist in the repository we may use default one it would be nice to inform users about what devfile we used to create a workspace.

Maybe somethign like Loading workspace from .devfile on this page.

Implementation can be separated into two phases.

• Put information about used devfile in workspaceConfig attributes.
• Display information in some places on UI.

[skabashnyuk]

CC @l0rd @slemeur

[l0rd]

What is most important is the case when no devfile is found in the repository. We should inform the user about it and that a generic development stack will be used.

[mshaposhnik]

Implemented as additional loading step:
Short demo with 2 cases - with and w/out devfile:
https://drive.google.com/file/d/1sHBfDwQSM4Wgx8hJNSMcqTIDlmrcM-mW/view?usp=sharing
@skabashnyuk @l0rd @slemeur wdyt ?

[l0rd]

@mshaposhnik that works fine for me thanks. I think you could improve it in 2 ways:

1. put the path of the devfile you are looking for (so that a dev will know how he need to call his devfile if it cannot be loaded)
2. if possible make the "not found sentence" more visible (i.e. using bold chars)

[mshaposhnik]

about the first - I'm added expected filename into message;
as for the second - i'm not sure it is possible with current dashb implenentation to set another text style for facory loading steps. The only avilable option yet is to fail step and make it bold red. If that strongly required we can make an separate issue.

[l0rd]

@mshaposhnik that's ok if we cannot make it bold.

[mshaposhnik]

Done in #12906