bufio's reader.ReadString includes any CRLF characters and we don't
want these in the resulting token because this leads to errors in the
authentication like this:

```
✗ failed to get Git repository
"https://github.com/kingdon-ci/jenkins-infra": Get
"https://api.github.com/repos/kingdon-ci/jenkins-infra

": net/http:
invalid header field value "Bearer gho_NNNNNsecrettokenMMMMM\n" for
key Authorization
```

Signed-off-by: Max Jonas Werner <mail@makk.es>

Signed-off-by: Max Jonas Werner <mail@makk.es>

This change adds functionality to both, `bootstrap github` and
`bootstrap gitlab` to prompt the user for the personal access tokens
if those can't be derived from the shell environment. Echoing is
turned off for better privacy.

Instead of having to interactively type the token or manually paste it
from the clipboard, users can also pipe it to Flux which comes in
handy e.g. when executing Flux remotely over an SSH connection:

```
$ echo 'asdf' | flux bootstrap github
```

Otherwise, Flux will prompt the user:

```
$ flux bootstrap github
Please type your GitHub personal access token:
```

closes #2011

Signed-off-by: Max Jonas Werner <mail@makk.es>

Add `DO NOT EDIT` warn to bootstrap sync manifests

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Update toolkit components

- source-controller to v0.17.2
  https://github.com/fluxcd/source-controller/blob/v0.17.2/CHANGELOG.md
- image-automation-controller to v0.16.1
  https://github.com/fluxcd/image-automation-controller/blob/v0.16.1/CHANGELOG.md



Signed-off-by: GitHub <noreply@github.com>

Use full domain name for notification-controller

Signed-off-by: Pawel Rozlach <vespian@users.noreply.github.com>

Set ECDSA as the default algorithm for `flux create source git`

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

bootstrap: Set ECDSA as the default SSH key algorithm

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Motivation: RSA SHA-1 SSH keys are no longer accepted by GitHub https://github.blog/2021-09-01-improving-git-protocol-security-github/

.
Given this we are switching the default from RSA to ECDSA for `git`, `github` and `gitlab` variants of `flux bootstrap`.

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Switch to `app.kubernetes.io/part-of` label selector

Use `app.kubernetes.io/part-of: flux` label instead of `app.kubernetes.io/instance` to select the in-cluster objects used in flux version, check, logs and uninstall commands.

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Add fetch timeout arg to create source commands

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Set default ns with `FLUX_SYSTEM_NAMESPACE` env var

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Add flux version to issue template

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Enable completion for flux tree cmd

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Add unit tests for export

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

- source-controller to v0.17.1
  https://github.com/fluxcd/source-controller/blob/v0.17.1/CHANGELOG.md



Signed-off-by: GitHub <noreply@github.com>

While fixing an unrelated issue, I noticed:
    ✗ GitRepository reconciliation failed: ''PGP public keys secret error: expected pointer, but got nil

the single quote should surround the readyCond.Message

Signed-off-by: Kingdon Barrett <yebyen@gmail.com>

Signed-off-by: Hidde Beydals <hello@hidde.co>

- source-controller to v0.17.0
  https://github.com/fluxcd/source-controller/blob/v0.17.0/CHANGELOG.md
- image-automation-controller to v0.16.0
  https://github.com/fluxcd/image-automation-controller/blob/v0.16.0/CHANGELOG.md



Signed-off-by: GitHub <noreply@github.com>

e2e: Retry the GitHub API calls

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Add test for customizing bootstrap

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

Expand Helm releases in flux tree cmd

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>