[FL-2649] Drop Docker in CI/CD (#1412)

* enable sparseCheckout, moving github actions from docker to raw shell
* fix missing known_hosts while setting ssh priv key
* fix build.yml
* add ssh key to upload just in time
* fixing rsync syntax
* fix build.yml
* try to fix build.yml again
* testing rsync
* test rsync again
* add linters
* add Black Python linter to submodules
* add Black submodule
* add working python linter target, dirty file list
* up toolchain to version 4
* up toolchain to ver 5
* up toolchain version to 6
* fbt: using black 22.6.0
* remove Black submodule, up toolchain to ver 7
* fbt: added lint_py, format_py targets
* add pvs_studio workflow
* fix pvs_studio segfault
* fix pvs_studio command
* fix pvs_studio command 2
* show env before run pvs_studio
* try to debug pvs_studio
* try to strace pvs_studio..
* Add FBT_TOOLCHAIN_PATH, MacOS Rosseta check, and ignore non-x86_64 linux architectures
* prevent redownloading toolchain on github-runners
* fix toolchain download exitcode
* add strace to debug pvs_studio segfault
* disable strace to catch full code dump
* Add './fbt cli' target to access Flipper CLI via PySerial
* remove pvs_studio from this PR
* removing clang-format from toolchain due errors
* make source easy, and fix some mistakes found by @hedger
* Add check_submodules workflow, some fixes
* fixing mistakes

Co-authored-by: hedger <hedger@nanode.su>
Co-authored-by: hedger <hedger@users.noreply.github.com>

SConstruct

@@ -7,6 +7,7 @@
 # construction of certain targets behind command-line options.
 
 import os
+import subprocess
 
 EnsurePythonVersion(3, 8)
 
@@ -231,6 +232,46 @@ distenv.PhonyTarget(
     LINT_SOURCES=firmware_env["LINT_SOURCES"],
 )
 
+# PY_LINT_SOURCES contains recursively-built modules' SConscript files + application manifests
+# Here we add additional Python files residing in repo root
+firmware_env.Append(
+    PY_LINT_SOURCES=[
+        # Py code folders
+        "site_scons",
+        "scripts",
+        # Extra files
+        "applications/extapps.scons",
+        "SConstruct",
+        "firmware.scons",
+        "fbt_options.py",
+    ]
+)
+
+
+black_commandline = "@${PYTHON3} -m black ${PY_BLACK_ARGS} ${PY_LINT_SOURCES}"
+black_base_args = ["--include", '"\\.scons|\\.py|SConscript|SConstruct"']
+
+distenv.PhonyTarget(
+    "lint_py",
+    black_commandline,
+    PY_BLACK_ARGS=[
+        "--check",
+        "--diff",
+        *black_base_args,
+    ],
+    PY_LINT_SOURCES=firmware_env["PY_LINT_SOURCES"],
+)
+
+distenv.PhonyTarget(
+    "format_py",
+    black_commandline,
+    PY_BLACK_ARGS=black_base_args,
+    PY_LINT_SOURCES=firmware_env["PY_LINT_SOURCES"],
+)
+
+# Start Flipper CLI via PySerial's miniterm
+distenv.PhonyTarget("cli", "${PYTHON3} scripts/serial_cli.py")
+
 
 # Find blackmagic probe