docs: --ignore-build-cache -> --no-run-cache

Per iterative/dvc#3788

content/docs/command-reference/repro.md

@@ -9,8 +9,8 @@ analyzing dependencies and <abbr>outputs</abbr> of the target stages.
 
 ```usage
 usage: dvc repro [-h] [-q | -v] [-f] [-s] [-c <path>] [-m] [--dry] [-i]
-                 [-p] [-P] [-R] [--ignore-build-cache] [--no-commit]
-                 [--downstream] [targets [targets ...]]
+                 [-p] [-P] [-R] [--no-run-cache] [--force-downstream]
+                 [--no-commit] [--downstream] [targets [targets ...]]
 
 positional arguments:
   targets               DVC-file to reproduce. 'Dvcfile' by default.
@@ -127,7 +127,10 @@ and only execute the final stage.
 - `-P`, `--all-pipelines` - reproduce all pipelines, for all the stage files
   present in `DVC` repository.
 
-- `--ignore-build-cache` - in cases like `... -> A (changed) -> B -> C` it will
+- `--no-run-cache` - execute stage commands even if they have already been run
+  with the same command/dependencies/outputs/etc before.
+
+- `--force-downstream` - in cases like `... -> A (changed) -> B -> C` it will
   reproduce `A` first and then `B`, even if `B` was previously executed with the
   same inputs from `A` (cached). To be precise, it reproduces all descendants of
   a changed stage or the stages following the changed stage, even if their

content/docs/command-reference/run.md

@@ -9,7 +9,7 @@ command and execute the command.
 usage: dvc run [-h] [-q | -v] [-d <path>] [-o <path>] [-O <path>]
                [-p <params>] [-m <path>] [-M <path>] [-f <filename>]
                [-w <path>] [--no-exec] [--overwrite-dvcfile]
-               [--ignore-build-cache] [--no-commit]
+               [--no-run-cache] [--no-commit]
                [--outs-persist <path>] [--outs-persist-no-cache <path>]
                [--always-changed]
                command
@@ -161,8 +161,8 @@ data pipeline (e.g. random numbers, time functions, hardware dependency, etc.)
   determined by the logic described in the `-f` option) without asking for
   confirmation.
 
-- `--ignore-build-cache` - forcefully execute the `command` again, even if the
-  same `dvc run` command has already been run in this workspace. Useful if the
+- `--no-run-cache` - forcefully execute the `command` again, even if the same
+  `dvc run` command has already been run in this workspace. Useful if the
   command's code is non-deterministic (meaning it produces different outputs
   from the same list of inputs).